Question

question 18
what is transcription?

a the attachment of trna to amino acids
b the process of making an mrna copy of a gene
c the process of duplicating chromosomes
d the process of joining amino acids into a protein

question 19
where does transcription occur?

a in the nucleus
b in a ribosome
c in a mitochondrion
d in the golgi apparatus

Explanation:

Question 18

• Option a: Attachment of tRNA to amino acids is aminoacylation, not transcription.
• Option b: Transcription is the synthesis of mRNA from a DNA gene template.
• Option c: Duplicating chromosomes is DNA replication, not transcription.
• Option d: Joining amino acids into a protein is translation, not transcription.

• Option a: In eukaryotes, transcription (DNA to mRNA) occurs in the nucleus where DNA is located.
• Option b: Ribosomes are for translation (protein synthesis from mRNA).
• Option c: Mitochondria have their own DNA and transcription, but the main cellular transcription (nuclear DNA) is in the nucleus; this is not the primary site for general transcription.
• Option d: Golgi apparatus is for protein modification, not transcription.

Answer:

b. the process of making an mRNA "copy" of a gene

Question 19